Rotary stretch blow molding apparatus
AssigneeMonsanto Company
InventorsIvan L. Kauffman, Robert C. Kellogg
Life of this patent
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Abstract
A continuous motion stretch blow molding apparatus for blow molding hollow articles from tubular parisons. A rotary parison loading turret loads parisons sequentially onto a plurality of stretch pin means operatively carried on a continuous motion transfer means which then conveys each of said stretch pin means into an operative position in a molding station on a continuous motion multi-station rotary molding turret. The parisons are stretched longitudinally, blown to form a final article, cooled in the molding stations, and then said article is ejected.
Claims34
In a continuous motion stretch blow molding apparatus for blow molding hollow articles from preheated tubular parisons at orientation temperature having one open end and one closed end, the combination comprising:
- (a) a continuous motion parison transfer means;
- (b) a plurality of upwardly disposed stretch pin means carrying said open ends of said parisons in a fixed plan of travel and operatively carried on said transfer means;
- (c) a continuous motion rotary parison loading turret for receiving preheated parisons and for sequentially loading them onto said stretch pin means including:
- (i) a parison loading station;
- and
- (ii) a plurality of parison loading chutes operatively mounted on the rotary parison loading turret, each of said loading chutes arranged to be disposed over one of said stretch pin means and movable under said parison loading station for receiving a parison and loading the parison onto the stretch pin means disposed thereunder;
- (d) means synchronized with the movement of said chutes for sequentially dropping parisons into the chutes;
- (e) a continuous motion rotary molding turret having a plurality of molding stations;
- and
- (f) said transfer means being operative to locate each of said stretch pin means with a parison loaded thereon in an individual one of said molding stations for a stretching, blowing and cooling operation on each parison on each stretch pin means to form an article from each parison.
Dependencies are inferred from the claim text.